脳梁欠損を伴った脳梁脂肪腫の1手術例

Lipoma of Corpus Callostun with Callosal Agenesis

Ⅰ．はじめに

　頭蓋内脂肪腫は，1818年Meckelが視束交叉部の脂肪腫を記載して以来^3），数々の報告があるが，一般に稀なものとされ，頭蓋内腫瘍の約O．03％といわれる^10）．ちなみにわが国の脳腫瘍全国統計委員会でまとめた6,204例の原発性脳腫瘍中，脂肪腫はわずか1例にすぎない^11）．われわれは最近，脳梁欠損を伴った頭蓋内脂肪腫の1手術例を経験し，CT所見を中心に検討したので，若干の文献的考察を加え，ここに報告する．

Intracranial lipoma is rare.

The case reported here was a woman aged 60. She came to our hospital with complaint of headache. Neurological examination was negative. Plain craniogram showed abnormal calcification in the callosal region. A-P view of right carotid angiogram revealed winding sinous course of bilateral anterior cerebral arteries around the calcific deposit. Lateral view showed vertical stretching of ascending portion of the anterior cerebral artery.

In the frontal projection of the pneumogram, the lateral ventricles were separated and concave medially with hornlike superior angles. The third ventricle extended upward between the lateral ventricles.